Virginia SOL 4.MG.1.a.ii
The Standard
weight/mass in both U.S. Customary (ounce, pound) and metric units (gram, kilogram)
Virginia Standards of Learning for Mathematics · The student will reason mathematically to solve problems, including those in context, that involve length, weight/mass, and liquid volume using U.S. Customary and metric units.
Teacher's field guide
What This Standard Means
What Students Need to Do
- Students choose a sensible unit for the weight or mass of an object. They decide between ounce and pound, or between gram and kilogram, based on the object’s size and heaviness.
What Mastery Looks Like
- Students choose grams or ounces for light objects and kilograms or pounds for heavier objects. They justify each choice by comparing the object with a familiar benchmark.
Common Misconceptions
- Students may choose pounds or kilograms for very light objects, or ounces or grams for heavy objects. They may also confuse ounces of weight with fluid ounces used for volume.
How to Assess It
- Give an exit ticket: “Choose gram or kilogram for a paper clip. Choose ounce or pound for a loaded backpack. Explain each choice.”
Lesson moves
Ways to Teach It
Set out classroom objects for students to lift, then label each with a sensible U.S. and metric unit.
Ask students to explain why a bicycle should be measured in pounds or kilograms rather than ounces or grams.
Play a unit match game using object cards and four unit cards: ounce, pound, gram, and kilogram.
Examine grocery labels and record which products list ounces, pounds, grams, or kilograms.
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Printable 4.MG.1.a.ii Worksheet
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Related Standards
- 4.MG.1.b.ii
weight/mass of an object to the nearest U.S. Customary unit (ounce, pound) and nearest metric unit (gram, kilogram); and
- 4.MG.1.d.ii
weight/mass (ounces and pounds); and
- 5.MG.1.c.ii
mass (grams and kilograms); and
- 3.MG.1.b.ii
weight/mass of an object to the nearest U.S. Customary unit (pound) and metric unit (kilogram); and
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